Metal belt for continuously variable transmission

Abstract

A metal belt is wound around a drive pulley and a driven pulley of a continuously variable transmission. Since intervals between multiple adjuster metal element groups are set so as to avoid that the number of the adjuster metal element groups simultaneously existing on a driving-side chord portion of the metal belt between the drive pulley and the driven pulley is 2 or more, it is possible to prevent large vibration which would occur if two or more adjuster metal element groups would exist on the driving-side chord portion of the metal belt. Furthermore, since the multiple adjuster metal elements are distributionally disposed in the multiple adjuster metal element groups, it is possible to decrease imbalance among the adjuster metal element groups, compared with a case where all the adjuster metal elements are disposed in a single adjuster metal element group. Thereby, the vibration can be reduced more.

What is claimed is: 
     
       1. A metal belt for a continuously variable transmission, the metal belt being wound around a drive pulley and a driven pulley so as to transmit driving force, in which
 the metal belt includes a plurality of metal elements which are supported by a metal ring assembly, and in order to adjust gaps between the metal elements, a plurality of adjuster metal element groups are disposed on the metal belt at predetermined intervals, each of the adjuster metal element groups including at least two or more continuous adjuster metal elements whose thickness differs from that of the metal elements, wherein 
 the intervals between the plurality of adjuster metal element groups are set so as to avoid that the number of the adjuster metal element groups simultaneously existing on a driving-side chord portion of the metal belt between the drive pulley and the driven pulley is 2 or more. 
 
     
     
       2. The metal belt for a continuously variable transmission according to  claim 1 , wherein the number of the adjuster metal element groups disposed on the metal belt is 3.